Francis edward elmore



(No Model.)

F.E'.ELMORE. MANUFACTURE or MANDEELS FOB. ELECTROLYTIC DEPOSIT or TUBES.

No. 485,919. Patented Nov. 8, 1892.

STATES Uivrrn "PATENT @FFICE.

FRANCIS EDIVARD ELMORE, OF LEEDS, ASSIGNOR TO ELMORES AMERICAN ANDCANADIAN PATENT COPPER DEPOSITING COMPANY, LIMITED, OF

LONDON, ENGLAND.

MANUFACTURE OF MANDRELS FOR ELECTROLYTIC DEPOSIT OF TUBES.

SPECIFICATION forming part of Letters Patent No. 485,919, dated November8, 1892.

Application filed August 12, 1891. Serial No. 402,446. (No modemPatented in England May 22, 1890, No. 7,932; in France March 26,1891,110. 212,385: in Sweden May 14, 1891, No. 3,668; in Switzerland May15, 1891, No. 3,539: in Norway May 19, 1891,1T0. 2,282: in Lnxembnrg-June 1, 1891,110. 1,456: in Italy June 10,1891, LVIII, 229; in Cape ofGood Hope June 18,1891,No. 695; in Victoria July 3, 1891,110. 8,848: inTasmania July 6, 1891, No. 951/10; in New South Wales July 7, 1891, No.3,104; in South Australia July '7, 1891, No. 1,974; in Queensland July8,1891,1 To. 1,357; in New Zealand July 16, 1891, No. 5,095; in SpainJuly 18, 1891, No. 12,111, in Brazil July 29, 1891,1Io. 1,258: inWestern Australia February 2, 1892, No. 312,- in Oanada February 22,1892,1To. 38,323; in India April 19,1892, 110.179/91, and inAustria-HungaryMay 11, 1892,1To. 41,093 and No. 9,431.

To all whom it may concern.-

Be it known that I, FRANCIS EDWARD EL- MORE, a citizen of England,residing at Spring Grove, Hunslet, Leeds, in the county of York,

England, have invented certain new and useful Improvements in theManufacture of Mandrels for Electrolytic Deposit of Tubes, for which Ihave obtained patents in Great Britain, dated May 22,1890,No. 7,932; inFrance,

dated March 26, 1891, No. 212,385; in Austria- I-Iungary, dated May 11,1892, Nos. 41,093 and 9,431 in Switzerland, dated May 15, 1891, andJanuary 9, 1892, No. 3,539; in Sweden, dated May 14, 1891, and February18,1892, No. 3,568; in Norway, dated May 19 and September 30, 1891, No.2,282; in Spain, dated July 18, 1891, No. 12,111; in Italy, dated June10, 1891,Vol. LVIII, 229; in Luxemburg, dated June 1,1891, No. 1,456; inVictoria, dated July 3, 1891, No. 20 8,848; in New South Wales, datedJuly 7, 1891, No. 3,104; in New Zealand, dated July 16,1891, No. 5,095;in South Australia, dated July 7, 1891, No. 1,974; in Tasmania, datedJuly 6, 1891, No. 951/10; in Queensland, dated July 8, 1891, and January28, 1892, No. 1,357; in Cape of Good Hope, dated June 18, 1891, No. 695;in India, dated April 19 and May 20, 1892, No. 179/91; in Canada, datedFebruary 22, 1892, No. 38,323; in Brazil, dated July 29, 1891, No.1,258, and in Western Australia, dated February 2, 1892, No. 312,) ofwhich the following is a full, clear, and exact specification.

For the manufacture of tubes by electrolysis, as described in formerspecifications, a

3 5 mandrel operating as a cathode is caused to revolve in anelectrolytic bath in which there is an anode of the metal to bedeposited, and the anode and cathode being connected to a source ofelectricity the metal as it is deposited on the mandrel is rendereddense, com

pact, and homogeneous in structure by a burnisher pressing against itand traveling to and fro longitudinally while the mandrel revolves.

When the metal has been deposited to the desired thickness on themandrel, it is removed in the form of a tube.

My present invention relates to the preparation of suitable mandrels foroperating as cathodes to receive the electrolytic deposit. In formingthe mandrel I employ a thin but stiff metal tube, preferably one made byelectrolytical deposit and selected as being true and even. I coat thistube with material fusible ata moderately-low temperature. It may befusible metal or paraffine-wax' or similar substance, which when coldsets to a firm consistence. The coating may be applied in various ways;but preferably I adopt the following method to obtain a coating with atrue and smooth surface. I cause the tube that is to be coated torevolve as a roller (more or less) nearly in contact with anotherroller, and in the gap between the two rollers I place a body of thematerial that is to form the coating. I keep the mandrel-tube cool bycirculating Water through it or otherwise, and I keep the roller by itsside heated by steam or otherwise, so to melt the coating material whichadheres to the cold mandrel and is smoothed off and polished by the hotroller, the mandrel being thus coated to a thickness which can be variedaccording as the axis of the roller is adjusted nearer to or fartherfrom that of the mandrel.

Figure 1 of the accompai'iying drawings is a transverse section, andFig. 2 is a side view sh wing a tube receiving a coating of fusiblematerial to constitute an electrolytic mandrel.

The tube a has its ends provided with tubular trunnions a, mounted inbearings in a suitable framing, so as to be free to revolve. In the sameframing are bearings adjustable by screwsffor the tubular journals g ofthe hollow roller g. By means of pipes connected to the trunnions a, andg, respectively, cold water and steam can be admitted to the interiorsof a and g, while they revolve the readily-fusible material contained'ina feedtrough I) being melted and deposited as an even-polished coatingon the tube a.

When the coating is of paraffine-wax'or such like material, which is abad conductor of electricity, I may prick through it in numerous placesto the metal of the mandrel; or I may in the first instance mix with themolten material some substance soluble in water such, for instance, ascommon saltwhich when the mandrel is in the electrolytic bath willdissolve out, leaving the coating more or less porous. I cover thesurface'of the coating with plumbago or other conducting substance; butthis is not necessary when fusible metal is employed as the coating.After the metal is deposited on the mandrel to the desired thickness themandrel may be heated sufficiently to melt the coating material, andthen I can readily withdraw the mandrel from the shell deposited on it.

Having thus described the nature of my invention and the best means Iknow of carrying the same into practical efiect-J claim- 1. The processof manufacturing mandrels for electrolytic deposit of tubes thereomwhichconsists in coating said mandrels with easilyfusible material andsimultaneously polishing such easily-fusible material.

2. The process of manufacturing mand rels for electrolytic deposit oftubes thereon, which consists in coating said mandrels by revolving thesame in contact with easily-fusible mate- July, A. D. 1891.

FRANCIS EDWARD ELMORE. \Vitnesses:

A. S. ToYED, S. D. ELVIN.

